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Effects of chalazion excision on ocular aberrations
Ali A Sabermoghaddam1, Siamak Zarei-Ghanavati, Mojtaba Abrishami
1Eye Research Center, Khatam-al-Anbia Hospital, Mashhad University of Medical Sciences, Mashhad, Iran.
Cornea
|October 23, 2012
Summary
Upper eyelid chalazion removal significantly reduced higher-order aberrations, improving ocular measurements. This suggests chalazion excision is beneficial before refractive surgery, especially wavefront-guided procedures.
Area of Science:
- Ophthalmology
- Optometry
Background:
- Upper eyelid chalazion can influence ocular wavefront aberrations.
- Accurate preoperative assessment is crucial for successful refractive surgery outcomes.
Purpose of the Study:
- To compare higher-order aberrations before and after upper eyelid chalazion excision.
- To evaluate the impact of chalazion on ocular aberrations and refractive surgery planning.
Main Methods:
- Prospective interventional case series involving 14 eyes from 12 patients with upper eyelid chalazion.
- Chalazion excision via standard transconjunctival vertical incision.
- Ocular aberrations measured using aberrometry (ZyWave) pre- and post-surgery (2 months).
Main Results:
- Total higher-order aberrations (root mean square) decreased significantly from 0.67 ± 0.12 to 0.43 ± 0.15 μm (P = 0.012).
- Specific Zernike orders (vertical/horizontal trefoil, horizontal coma) and 5 mm zone corneal irregularity also decreased.
- Minimum simulated keratometry increased post-excision (P = 0.046).
Conclusions:
- Chalazion increases higher-order aberrations, potentially impacting refractive surgery results, particularly wavefront-guided surgery.
- Chalazion excision can reduce ocular aberrations.
- Preoperative chalazion removal is recommended to optimize refractive surgery outcomes.
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